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Switch-specific and general preparation map onto different ERP components in a task-switching paradigm
journal contribution
posted on 2023-05-18, 08:09 authored by Karayanidis, F, Provost, A, Brown, S, Paton, B, Heathcote, AWe examined whether the cue-locked centroparietal positivity is associated with switch-specific or general preparation processes. If this positivity (300–400 ms) indexes switch-specific preparation, faster switch trials associatedwith smaller RTswitch cost should have a larger positivity as compared to slower switch trials, but no such association should be evident for repeat trials. We extracted ERP waveforms corresponding to semi-deciles of each participant’s RT distribution (i.e., fastest to slowest 5% of trials) for switch and repeat conditions. Consistent with a switch-specific preparation process, centroparietal positivity amplitude was linked to slower RTand larger RTswitch cost for switch but not repeat trials. A later pre-target negativity (500–600 ms) was inversely correlated with RT for both switch and repeat trials, consistent with a general anticipatory preparation processes.
History
Publication title
Psychophysiology: An International JournalVolume
48Pagination
559-568ISSN
0048-5772Department/School
Tasmanian School of MedicinePublisher
Blackwell Publishing LtdPlace of publication
9600 Garsington Rd, Oxford, England, Oxon, Ox4 2DgRights statement
Copyright 2011 Society for Psychophysiological ResearchRepository Status
- Restricted